056
FNCA52 TJSJ 310840
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
440 AM AST WED DEC 31 2025
DISCUSSION
DRIER CONDITIONS WILL GENERALLY PERSIST ACROSS THE REGION;
HOWEVER, INCREASING MOISTURE IS FORECAST TODAY AS WINDS VEER AND
ALLOW POCKETS OF MOISTURE TO MOVE ACROSS THE ISLANDS. RELATIVE
HUMIDITY VALUES ARE EXPECTED TO REMAIN IN THE UPPER 40S TO MID
50S, BRIEFLY DROPPING INTO THE MID 40S DURING THE EARLY MORNING
HOURS. SURFACE WINDS WILL SHIFT TO A MORE SOUTHERLY COMPONENT AND
INCREASE TO AROUND 15 MPH DURING THE AFTERNOON. DESPITE THE ADDED
MOISTURE, FUELS REMAIN DRY, AND THE COMBINATION OF LOW RELATIVE
HUMIDITY AND INCREASING WINDS WILL MAINTAIN A MODERATE FIRE
WEATHER RISK ACROSS THE SOUTHERN COASTAL PLAINS.
PRZ014-010845-
SOUTHEAST COASTAL PLAINS-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 0 0
TEMP (24H TREND) 87 (+4) 69 (-2) 87
RH % (24H TREND) 49 (-1) 88 (+6) 46
WIND 20FT/EARLY(MPH) SE 11 E 10 SE 12
WIND 20FT/LATE(MPH) SE 11 E 10 SE 12
MIXING HGT(FT-AGL/MSL)4200 4740
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 33600 33180
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-010845-
SOUTHERN HILLS-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 83 (+4) 65 (-3) 83
RH % (24H TREND) 61 (-1) 97 (+11) 60
WIND 20FT/EARLY(MPH) SE 9 E 8 E 8
WIND 20FT/LATE(MPH) SE 9 E 8 E 8
MIXING HGT(FT-AGL/MSL)4460 5000
TRANSPORT WND (MPH) E 6 E 7
VENT RATE (KT-FT) 22300 30000
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-010845-
NORTH COASTAL PLAINS-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 86 (+3) 70 (-1) 86
RH % (24H TREND) 58 (-2) 92 (+8) 59
WIND 20FT/EARLY(MPH) E 9 SE 9 E 13
WIND 20FT/LATE(MPH) E 9 SE 9 E 13
MIXING HGT(FT-AGL/MSL)4180 4700
TRANSPORT WND (MPH) E 6 E 8
VENT RATE (KT-FT) 20900 32900
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-010845-
NORTHERN HILLS-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 20 60
TEMP (24H TREND) 84 (+2) 66 (-2) 84
RH % (24H TREND) 59 (+1) 95 (+7) 58
WIND 20FT/EARLY(MPH) NE 8 SE 6 NE 11
WIND 20FT/LATE(MPH) NE 8 SE 6 NE 11
MIXING HGT(FT-AGL/MSL)4330 5320
TRANSPORT WND (MPH) NE 3 E 6
VENT RATE (KT-FT) 12990 26600
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-010845-
WEST COAST-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 40 40
TEMP (24H TREND) 86 (+3) 69 (-1) 86
RH % (24H TREND) 61 (0) 95 (+9) 61
WIND 20FT/EARLY(MPH) E 10 E 10 E 9
WIND 20FT/LATE(MPH) E 10 E 10 E 9
MIXING HGT(FT-AGL/MSL)4190 4610
TRANSPORT WND (MPH) E 8 E 6
VENT RATE (KT-FT) 29330 23050
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-010845-
EASTERN INTERIOR-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 84 (+3) 66 (-3) 84
RH % (24H TREND) 60 (-2) 99 (+12) 61
WIND 20FT/EARLY(MPH) SE 8 SE 9 E 9
WIND 20FT/LATE(MPH) SE 8 SE 9 E 9
MIXING HGT(FT-AGL/MSL)4710 5230
TRANSPORT WND (MPH) SE 6 E 7
VENT RATE (KT-FT) 23550 31380
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-010845-
LUQUILLO MOUNTAIN RANGE-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 40
TEMP (24H TREND) 80 (+5) 63 (-3) 81
RH % (24H TREND) 64 (-5) 100 (+6) 66
WIND 20FT/EARLY(MPH) SE 6 SE 6 E 8
WIND 20FT/LATE(MPH) SE 6 SE 6 E 8
MIXING HGT(FT-AGL/MSL)4000 4690
TRANSPORT WND (MPH) SE 6 E 8
VENT RATE (KT-FT) 20000 32830
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-010845-
CENTRAL MOUNTAIN RANGE-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30
TEMP (24H TREND) 83 (+6) 63 (-3) 83
RH % (24H TREND) 60 (-2) 97 (+5) 59
WIND 20FT/EARLY(MPH) SE 6 SE 5 NE 6
WIND 20FT/LATE(MPH) SE 6 SE 5 NE 6
MIXING HGT(FT-AGL/MSL)5050 6210
TRANSPORT WND (MPH) SE 3 E 3
VENT RATE (KT-FT) 15150 18630
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-010845-
CAYEY MOUNTAIN RANGE-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 80 (+4) 64 (-2) 80
RH % (24H TREND) 64 (-2) 100 (+8) 66
WIND 20FT/EARLY(MPH) SE 6 SE 6 E 8
WIND 20FT/LATE(MPH) SE 6 SE 6 E 8
MIXING HGT(FT-AGL/MSL)4310 4680
TRANSPORT WND (MPH) E 6 E 8
VENT RATE (KT-FT) 21550 32760
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-010845-
VIEQUES-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 10
TEMP (24H TREND) 85 (+3) 69 (-2) 85
RH % (24H TREND) 55 (-1) 97 (+10) 55
WIND 20FT/EARLY(MPH) SE 9 SE 10 E 10
WIND 20FT/LATE(MPH) SE 9 SE 10 E 10
MIXING HGT(FT-AGL/MSL)3630 4120
TRANSPORT WND (MPH) SE 9 E 9
VENT RATE (KT-FT) 29040 32960
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-010845-
CULEBRA-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR CLEAR CLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 10 0 0
TEMP (24H TREND) 83 (0) 71 (-3) 86
RH % (24H TREND) 57 (-2) 93 (+12) 56
WIND 20FT/EARLY(MPH) SE 9 SE 10 E 9
WIND 20FT/LATE(MPH) SE 9 SE 10 E 9
MIXING HGT(FT-AGL/MSL)3770 4150
TRANSPORT WND (MPH) SE 9 E 10
VENT RATE (KT-FT) 30160 37350
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-010845-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 87 (+4) 69 (-3) 87
RH % (24H TREND) 50 (-1) 93 (+12) 49
WIND 20FT/EARLY(MPH) SE 14 G19 E 14 G18 SE 12 G17
WIND 20FT/LATE(MPH) SE 14 G19 E 14 G18 SE 12 G17
MIXING HGT(FT-AGL/MSL)4310 4740
TRANSPORT WND (MPH) SE 13 E 10
VENT RATE (KT-FT) 47410 42660
DISPERSION 5 5
DSI 5 5 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-010845-
SAINT THOMAS AND SAINT JOHN-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER CLEAR CLEAR CLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
TEMP (24H TREND) 81 (-1) 73 (0) 85
RH % (24H TREND) 62 (+3) 87 (+7) 57
WIND 20FT/EARLY(MPH) SE 9 SE 10 E 8
WIND 20FT/LATE(MPH) SE 9 SE 10 E 8
MIXING HGT(FT-AGL/MSL)3690 4160
TRANSPORT WND (MPH) SE 9 E 9
VENT RATE (KT-FT) 29520 33280
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-010845-
ST CROIX-
440 AM AST WED DEC 31 2025
TODAY TONIGHT THU
CLOUD COVER MCLEAR CLEAR CLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 0 0 0
TEMP (24H TREND) 83 (+1) 70 (-3) 85
RH % (24H TREND) 60 (0) 94 (+12) 59
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 10 E 10 E 10
MIXING HGT(FT-AGL/MSL)3960 4570
TRANSPORT WND (MPH) SE 12 E 12
VENT RATE (KT-FT) 39600 45700
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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